VARINDIA IT MAGAZINE

Nokia and WorldLink are upgrading 650-km-long backbone network with Nokia’s 1830 PSS (Photonic Service Switch) DWDM (Dense Wavelength Division Multiplexing) technology to support bandwidth-hungry entertainment and enterprise services across the country. The intercity network stretches from Kathmandu to Bhairahawa and Birgunj, and provides international connectivity between Nepal and other countries, including India. WorldLink, the largest fixed broadband operator in the Himalayan country, has 120,000 residential broadband subscribers and 5,000 enterprise broadband circuits. It is now connecting 10,000 residential Fiber-to-the-Home (FTTH) service subscribers every month, requiring the operator to meet ever-increasing demand for network capacity. Nokia’s optical network technology will allow WorldLink to flexibly increase its network capacity, reach and density as the technology is powered by the industry’s most programmable chipset, Nokia’s Photonic Service Engine-2 with super cohe...

VARINDIA- INDIA'S FRONTLINE IT MAGAZINE   NEC has participated in Japan's first DWDM transmission of 100Gbps per wavelength, realized using commercial fiber cable along Japan’s highest volume transmission route connecting the 710 km between Tokyo, Nagoya and Osaka. These results were accomplished through 100Gbps optical transmission trials carried out by NTT Communications Corporation. Tests were conducted using existing commercial cable with the intention of introducing 100Gbps-DWDM systems to backbone networks in the near future. These actual operating conditions present a variety of operational challenges, including fluctuations in optical signal loss due to transmission route changes and variability in optical fiber characteristics (Chromatic Dispersion, Polarization-Mode Dispersion. NEC's 100Gbps-DWDM system addressed these issues by utilizing a transponder equipped with its internally developed 100G DP-QPSK digital coherent optical transceiver module, which d...

VARINDIA- INDIA'S FRONTLINE IT MAGAZINE Ciena Corporation has announced its selection as vendor for BT's 21st Century Network (21CN), reinforcing Ciena's position as a strategic supplier for one of the world's leading communications services companies. The resilient, adaptable and scalable architecture from Ciena will underpin BT's next generation broadband and Ethernet efforts, which include an expanded portfolio of high-bandwidth technology applications to homes and businesses, and will also enable the company to utilise 40G and 100G technology in the core of its network. Neil J. McRae, Chief Network Architect, BT said, "Our long-standing relationship with Ciena has enabled us to bring targeted innovation to market ahead of our competition. This deployment underpins BT's product range and in particular supports growth in Wholesale Broadband Connect and Managed Ethernet Access Service. Ciena's leading technology and unique approach to customer partners...